Diamond grinding wheel adopting rare-earth modified tungsten-based bond and manufacturing method thereof

A tungsten-based binder and rare earth modification technology, used in the manufacture of tools, abrasives, grinding devices, etc., can solve the problems of graphitization of diamond particles, high sintering temperature, and narrow application range, and achieve stable particle size and high hardness. , good effect

Active Publication Date: 2014-12-03
南安华大石材产业技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melting point of tungsten is as high as 3940°C. The temperature required for sintering with tungsten as a metal bond far exceeds the ability of diamond, which is likely to cause graphitization of diamond particles. Therefore, most of the sintering temperatures are relatively low at present. Tungsten carbide-based binder, pure metal tungsten-based binder has not been reported
However, on the one hand, tungsten carbide-based binders have formed carbides on the tungsten element itself, which weakens the effect of chemical metallurgical bonding with diamond; Diamond with better thermal performance is used together, the cost is higher, and the application range is narrow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Preparation of rare earth modified tungsten-based binder: based on the total mass of the rare earth modified tungsten-based binder, it contains the following components: 75% tungsten, 5% nickel, 4% iron, 8% tin, 7% copper, manganese 0.5%, lanthanum oxide 0.5%, the above components are fully mixed and then uniformly ground by high-energy ball mill; the artificial single crystal diamond powder with a particle size of 40 / 50 is fully mixed with the above-mentioned rare earth modified tungsten-based binder according to the diamond concentration of 75% ;

[0028] 2) According to the shape of the required diamond grinding tire body, use the corresponding mold to cold press the above mixture, then carry out vacuum hot pressing sintering, the sintering temperature is 950 ° C, the sintering pressure is 150KN, and the sintering time is 30 minutes;

[0029] 3) After vacuum hot pressing sintering, carry out hot isostatic pressing sintering, the sintering temperature is 850°C, the...

Embodiment 2

[0032] 1) Preparation of rare earth modified tungsten-based binder: based on the total mass of the rare earth modified tungsten-based binder, it contains the following components: 70% tungsten, 5% nickel, 4% iron, 11% tin, 9% copper, manganese 0.5%, lanthanum oxide 0.5%, the above components are fully mixed and then uniformly ground by high-energy ball mill; the artificial single crystal diamond powder with a particle size of 40 / 50 is fully mixed with the above-mentioned rare earth modified tungsten-based binder according to the diamond concentration of 75% ;

[0033] 2) According to the shape of the required diamond grinding tire body, use the corresponding mold to cold press the above mixture, then carry out vacuum hot pressing sintering, the sintering temperature is 950 ° C, the sintering pressure is 150KN, and the sintering time is 30 minutes;

[0034] 3) After vacuum hot pressing sintering, carry out hot isostatic pressing sintering, the sintering temperature is 850°C, th...

Embodiment 3

[0037] 1) Preparation of rare earth modified tungsten-based binder: based on the total mass of the rare earth modified tungsten-based binder, it contains the following components: tungsten 60%, nickel 5%, iron 4%, tin 17%, copper 13%, manganese 0.5%, lanthanum oxide 0.5%, the above components are fully mixed and then uniformly ground by high-energy ball mill; the artificial single crystal diamond powder with a particle size of 40 / 50 is fully mixed with the above-mentioned rare earth modified tungsten-based binder according to the diamond concentration of 75% ;

[0038] 2) According to the shape of the required diamond grinding tire body, use the corresponding mold to cold press the above mixture, then carry out vacuum hot pressing sintering, the sintering temperature is 950 ° C, the sintering pressure is 150KN, and the sintering time is 30 minutes;

[0039] 3) After vacuum hot pressing sintering, carry out hot isostatic pressing sintering, the sintering temperature is 850°C, t...

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PUM

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Abstract

The invention discloses a diamond grinding wheel adopting a rare-earth modified tungsten-based bond and a manufacturing method thereof. The manufacturing method comprises the steps as follows: diamond powder and the rare-earth modified tungsten-based bond are mixed sufficiently, wherein the rare-earth modified tungsten-based bond comprises 40-75 parts of tungsten, 2-6 parts of nickel, 2-5 parts of iron, 8-30 parts of tin, 7-20 parts of copper, 0.4-1 part of manganese and 0.1-1 part of rare earth elements; the mixture is subjected to vacuum hot pressing sintering for 25-35 min under the conditions of 900-960 DEG C and 140-200 KN after cold press molding and then subjected to hot isostatic pressing sintering for 5-10 min under the conditions of 840-900 DEG C and 80-120 MPa to obtain a diamond grinding wheel tire body; and the diamond grinding wheel tire body is assembled to a grinding wheel substrate to obtain the diamond grinding wheel. The diamond grinding wheel and the manufacturing method have the advantages that the holding force of diamond particles can be increased remarkably, and the wear resistance of the diamond grinding wheel can be improved, so that the machinability of the diamond grinding wheel is improved, and the service life of the diamond grinding wheel is prolonged.

Description

technical field [0001] The invention relates to a rare earth modified tungsten-based bond diamond grinding wheel and a manufacturing method thereof. Background technique [0002] Diamond grinding wheels are widely used in the grinding of concrete, stone, and ground coatings. Commonly used diamond abrasive tire bodies include iron-based and cobalt-based. The iron-based matrix has high mechanical properties, good wettability to diamond, and low cost, but its self-sharpening is not good; while the cobalt-based matrix has good formability and sinterability, which is suitable for Diamond has good wettability, strong adhesion, good toughness, and good self-sharpening. It is the most widely used matrix in the field of diamond tools, but the diamond on the cobalt-based matrix is ​​mechanically held, resulting in diamond particles It cannot be fully exposed for effective cutting, and it will also be seriously worn due to the effect of the pulling force, making the diamond particles...

Claims

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Application Information

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IPC IPC(8): B24D3/10B24D3/34B24D18/00B22F5/00B22F1/00
Inventor 郭桦徐西鹏黄辉姜峰黄国钦
Owner 南安华大石材产业技术研究院
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